You could try setting up an ODBC DSN that connects to the file. In the setup for the DSN you would define how the fields are set up in the file. Then use the ODBC connection in the report instead of connecting directly to the file.
When you set up the DSN you need to remember two things:
1. Crystal will only work with 32-bit connections. So, if you're running on an 64-bit server, you need to use the 32-bit ODBC manager to create the DSN.
2. This must be a System DSN, not a User DSN.
-Dell